Computing scale



'April 2, 1929. J. PFEIFER COMPUTING SCALE Filed Feb. 4, 192'? {Sheets-Sheet A TTORNEYS.

Patented Apr. 2, 1929.

UNITED s'rA rss PATENT OFFICE.

JOHN PFEIFER, 0F SPRINGFIELD, OHIO, ASSIGNOB OF ONE-THIRD TO WILLIAM G.

i GRIM, OF SPRINGFIELD, OHIO.

ooivrrurnve SCALE.

Application filed. February This invention relates to improvements in automatic scales, it relating more particularly dications are more readily read and whereby the indicator may be used as a plumbing device for leveling the scale.

Another object of the invention is to provide an arrangement for mounting and operating the pan which will eliminate binding of the parts.

Another object of the invention is to pro vide a simple and effective arrangement for mounting the indicator and connecting the same with the pendulum whereby the indica tor may be accurately adjusted.

Another object of the invention is to provide a simple arrangement for applying the load to the pendulum, including a peculiar formation of the fulcrumed end of the pendulum. V v Further objects will be apparent from the accompanying drawings, description and claims: I

In the accompanying drawings:

Fig. 1 is a front elevation of a. scale embodying the improvements.

Fig. 2 is an elevation of the right handend of the machine as viewed in Fig. 1. Fig. 3 is an elevation of the left of the machine as viewed in Fig. 1.

Fig. t is a longitudinal section. Fig. 5 a perspective view of a portion of hand end the mechanism shown in Fig. 4.

Fig. 6 is a detail of the parts shown in Fig.4.

Tteferring to the drawings, 1 represents the base, 2 and grespectively the front and rear supporting plates preferably formed of sheet metal, and 4 a series at tierods connecting the plates together; the letter edges the 4, 1927. Serial No. 165,914.

in any suit-able manner.

connected to the base The pan 5' of the scale is riveted or otherwise secured to the upper transverse cross piece 6 ofa U-shaped supporting standard, are indicated 6 are' perforated to the vertical legs of which at 6. The lower ends of the legs loosely receive the rod 7 which serves to pivot the standard tothe side arms of a yoke-shaped lever, the connecting portion of which is indicated at 8. A yoke-shaped member 9 having its cross-piece bent to form a centrally-arranged ear 9, pivoted to the side frame members by the rod 10 and having its side arms pivotally connected to the legs 6 by the rod'11, serves to maintain the pan and its supporting legs 6 in upright position.

The arms 8 of this lever adjacent the portion 8 thereof are pivoted on a transverse rod frame members 2 and 3 supporting the pan, it there arethree pivotal n ection of the ear 9 12 which is supported in the side By this method of will be noticed that points, i. e., the conwith the rod 10 and the connections of the arms 8 with the rod 12,

binding but at tain the pan in a been found which permits the parts to swing without the same time maintains standard 6 1n a vertical plane so as to main horizontal position. It has in practice that by off-setting the the to an inverted V form as indicated at 16 tendency of the parts to bind in moving is further eliminated, providing the pan is olfset in the manner illustrated in the drawing,

that is, with its greater portion at the right of'the standards as viewed in Fig. 1.

' h m being suspended A red 13 having a weight 14 connected with its lower end forms a pendulum, this pendufrom a cross member 15,

supported by theside walls 2 and 3, through the medium of an extension 16 which is bent to an inverted V form as indicated at 16 with the apex of the V resting upon a knife edge bearing 17 formed the cross member 15.

on the upper edge of The extension 16 is further extended and provided with a second V-shaped portion 16 to receive a knife edge formedon a cross piece 18 secured to the upper ends of apair of straps 19, the lower end of each of which is bent toa V tonnes indicated at it receive-tents edges nected with the rod formed upon the lower edges of inturned projcctions 8 on the inner ends of the lever arm 8.

Formed on the front supporting plate is a chart hearing indications representing the price totals and weights and adapted to move over this chart is a pointer 21 bearing priceperpound indications. The pointer is pivoted at its upper end on the forward end of a transverse rod 22 which is carried on the upper endsof two arms 23 or": a yoke-shaped lever, the lower end of which is pivoted on the cross rod 24 carried by the side frame members. This lever is connected with the pendulum 13 by a connection which can be lengthened or shortened to allow for the proper adjustment of the pointer. To that end a rod 25 has a yoke 26 which straddles the pendulum rod 13 and is pivotally con- 13 by the pin 26 and is extended loosely through apertures in a pair of cars 27 and 27 upturned from the plate 28, which has downturned ears 29 pivoted upon a rod 30 extending between and carried by the lever arms 28. The rod 25 is threaded and has a nut 31 adapted to bear against the ear 27, and there is a coil spring 32 placed about the inner portion of the rod 25, interposed between the car 27 and the yoke 26, which serves to hold the plate 28 against the nut. By turning the nut, the arms 23 can be swung to or fro to thereby bring the left band edge of the pointer in line with the Zero indications of the chart.

For the purpose of adjusting for correct weight, the lower end of the pendulum rod 13 is threaded to receive nuts 33 between which the weight 14 is placed so that this weight can be adjusted to or from the fulcrum point of the pendulum.

By the arrangement described, a very simple scale is provided which can be economically manufactured. Practically all of the parts, including the base, side frame members yokes and levers are constructed of sheet metal thus enabling the'device to be very cheaply manufactured. By the arrangement of the pointer described, the pointer stands in a perpendicular position so that it can be used as a plumb for the purpose of leveling the machine, and, further, by having the indicating marks also arranged perpeiulicular, this enables the indications to be easily read.

Having thus described my invention, I claim:

1. In an automatic price scale, an indicator pivotally hung" from its upper end so as to normally stand in a perpendicularposition, a clia rt having perpendicular indication marks, automatic means for moving said indicator over said chart by the weight of the commodity, and an adjustable connection between said indicator and automatic means.

2. In an automatic price scale, a pivoted lever, an indicator pivotally hung from said lever so as to normally stand in. a pcrpcn dicular position, automatic means for mow ing said indicator by the weight of the coinmodity, and adjustable connections hetwcc said lever and said automatic means.

3. In an automatic price scale, a pivoted lever, an indicator pivotally hung from said lever so as to normally stand in a perpendicular position, an automatic means including a pendulum for moving said indicator by the weight of the commodity and an adjustable connection between said lever and said pendulum.

l. In an automatic price scale, a pivoted lever, an indicator pivotally connected with said lever so as to normally stand in a per pendicular position, a fulcrumed pendulum, a second lever, means pivotally connecting, said second lever with the fulcrumed end of said pendulum, a commodity pan supported upon said second lever, and an adj ustahlc connection between said first mentioned lever and said pendulum.

5. In an automatic price scale, a pivoted lever, an indicator pivotally connected with said lever to norn'ially stand in a perpcn dicular position, a fulcrumcd pendulum, a second pivoted lever, means pivotally con necting;' said second lever with the fulcrumcd end of said pendulum, astandard pivotally mounted on said second lever, a pivoted linlc pivotally connected with said standard to maintain the same in an upright position, a commodity pan on said standard, and an adjustable connection between said first mentioned lever and said pendulum.

6. In an automatic scale, a supporting frame, a yoke-shaped lever having; each of its arms pivotally supported by said frame, an inverted U-shaped standard having each of its legs pivotally connected with said lever, a yoke-shaped link having its arms pivotally connected with the legs of said standard and also having a centrally arranged ear pivotally connected with said frame, a pan supported on thehpper end of said standard in oft-set relation thereto, a movable indicator hand, and. connections between the free end of said lever and said indicator.

7. In an automatic scale, a supporting frame, a yoke-shaped lever having its arms pivotally connected with said frame, and an inverted U-shaped standard pivotally supported by said lever, a link pivotally connecting said standard with said frame, a pendulum fulcrumed upon said frame having a short arm and a weighted longvarm, a link connection between said yoke-shaped lever and the short arm of said pendulum, a second yoke-shaped lever having its lower end pivotally conected with said frame, an indicator pivotally hung from the upper end of said lever, and an adjustable connection between said lever and the long arm of said pcnduhnnl 8. In an automatic scale, a pendulum op- Ill) erable by the Weight of the commodity, a pivoted lever, an indicator pivot'ally connected with said lever, and a connection between said lever and said pendulum consisting of a mem- 5 her pivotally connected with said lever, a rod pivotally connected With said pendulum and passing through a pair of apertured ears on said member, a nut threaded on said rod for engagement for one of said ears, and a spring interposed between the outer of said ears and the inner end of said rod.

In testimony whereof, I have hereunto set my hand this 26th day of January, 1927.

JOHN PFEIFER. 

